JustiFLY(R) Feedthrough is widely considered as one of the best fly control products on the market. Our feedthrough add-pack is easier to use than other products such as dust bags, ear tags, sprays, and pour-on fly control for cattle. It can break the lifecycles of horn flies, face flies, stable flies and house flies. By controlling the fly population, it can decrease stress levels and prevent diseases in cattle. | Champion Animal Health JustiFly Feedthrough IGR 360gm Fly Control